//$Id: SFConsoleRenderer.java,v 1.1 2004/11/04 19:08:54 cssharp Exp $

/* "Copyright (c) 2000-2003 The Regents of the University of California.  
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose, without fee, and without written agreement
 * is hereby granted, provided that the above copyright notice, the following
 * two paragraphs and the author appear in all copies of this software.
 * 
 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY
 * OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
 */

//@author Cory Sharp <cssharp@eecs.berkeley.edu>
package tools.sf;

public class SFConsoleRenderer implements SFRenderer {
	boolean statusLine = false;
	boolean listening = false;
	int nclients = 0;
	int nread = 0;
	int nwritten = 0;

	public void SFConsoleRenderer() {
	}

	void clearStatus() {
		if (statusLine) {
			System.out
					.print("\r                                                                              \r");
			statusLine = false;
		}
	}

	void updateStatus() {
		clearStatus();
		System.out.print((listening ? "SF enabled" : "SF disabled") + ", "
				+ nclients + " " + (nclients == 1 ? "client" : "clients")
				+ ", " + nread + " " + (nread == 1 ? "packet" : "packets")
				+ " read, " + nwritten + " "
				+ (nwritten == 1 ? "packet" : "packets") + " written" + " ");
		statusLine = true;
	}

	public void message(String msg) {
		clearStatus();
		System.out.println(msg);
		updateStatus();
	}

	public void updatePacketsRead(int n) {
		nread = n;
		updateStatus();
	}

	public void updatePacketsWritten(int n) {
		nwritten = n;
		updateStatus();
	}

	public void updateNumClients(int n) {
		nclients = n;
		updateStatus();
	}

	public void updateListenServerStatus(boolean b) {
		listening = b;
		updateStatus();
	}
}
